Relieving attachment for lathes.



B. M. w. HANsoN.- RELIBVING ATTACHMENT POR LATHBS.

APPLICATION FILED SEPT. 2, 1909.

Y Patented Apr. 19, 19m 9,66 2S1mm-s-smm 1. .A

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B. M. W. HANSON. RBLIBVING ATTACHMENT FOB LATHES.

APPLICATION FILED SEPT. 2. 1969. I Y n v Patented Apr. 19, 1910.

, n H nm m. vwo m Y l .a 6 IWA. WM l MM 1.. 2, a, L1 w@ M m R L 4 l 6 a@ n a Flrhnnk1wl, n .a jr/7S 5;.. i n w m, www@ 5 9 UNITED STATES I )A'IEN'I OFFICE. BENG'I' M. W. HANSON, OF HABTFOgv-CONNECTICUT, ASSIGNOR TO PRATT @c WHITNEY COMPANY, F'HA1 ZTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

-Attacliments for Lathes, of which the following is a specification. y

` This invention relates to relieving attachments for lathes, the object of the invention being to provide a simple and ellective devlce of this character which can be readily and quickly applied to lathes of existia types Without any material or practica modification or change thereof.

A lathe equipped with the attachment can be. utilized with facility for relieving various kinds of tools but more especially what are known as coiinterbores.

In the drawings accompanying and forml ing part of the present specification I represent in detail one convenient form of embodiment of the invention which I will fully set forth in the following 'description this definite disclosure being made so that those skilled in the art can practice the invent-ion but as will be obvious I do'uot restrict myself to thev showingr 'thus made for certain variations may be adopted within the scope of my'inventioii as expressed in the claims succeeding said description.

Referring to said drawings, Figure 1 is a top lanA view of the head end of a lathe rovided with an attachment including my invention. Fig. 2 is a side elevation of a. ortion of the carriage, certain slides of the athe, and. some of the members of the attachment, partially in section7 and, Fig. 3' is a top plan view (partially in section of a swivel member an certain'adjunctive parts hereinafter fully described. Like characters refer to like parts throu hout the several fi i'es. In ig. 1 ofthe drawings I have illustrated somewhat fully the head portion of a lathe of known construction for which reason those parts which. are'old'will be but briefly described. The numeral 2 denotes the of the lathe and 3 the head-stock 'videdwith the work-spindle 4 the-driv ingv means for lwhich consist of the usualk Specincation of Letters latent.

Application led September 2, 1909. I Serial No. 515,90.

BELIEVING ATTACHMENT FOR LTHES.

Patented Apr. 19,1910.

cone-pulley 5 and back-gearing denoted in a general Way by 6.

I have represented as a part of thel attachment a bracket which is detachahly connected in some suitable manner witlrthe bed 2 and a bracket as 7 answers my purpose and while the same maybe of any desirable form it is shown as being angular one branch or the body thereof being connected by screws as 8 or otherwise with one side of the bed 2 near the head end of the bed 2. The outwardly extending branch of said bracket 7 servesl as a convenient means for supporting a stud-shaft as 9 to which `one end .of a telescopic shaft as 10 is connected by a universal joint as 11 said stud shaft having preferably fixed thereto a pinion 12 shown as in mesh with a. spurgear 13 on one end` of a stud-shaft as 14 the o pcsite end of said stud-shaft 14 having fixe thereto a pinion 15 constituting part of the change gearing. The pinion 15 is shown as being in mesh with the spur-gear 16 rotatively vsupported by the yoke or bar 1T which swings as is usual about and is supported by the stud-shaft 14. The spur-gear 16 is shown as being in mesh with the pinion 17 driven from the worksspiiidle 4 inthe customary manner. 'Il dlsinounting the gears 15 and 1G and pu ting others in their stead the ratios of movement of the spindle 4 and telescopic or extensible shaft 10.may be varied, the relative velocities of said spindle and shaft depending upon the flutes.

or analogous devices upon a-counterboring or other tool being relieved. y

T he carriage or main-slide of the lathe is designated in a general way by 18 the bed 2 being equipped with ways to permit the. movement of said carriage longitudinally of said bed. The carriage 18 supports for movement a cross-slide as 19 through the` v manner to the carriage.. The way or plate 20 constitutes a suitable supy rt for a plate 21 the latter being detacha ggheld in position by screws as 22'. The plate 21 is shown as having upon the outer side thereof bearings for a shaft 23 connected by a universal joint as 24 with the telescopic shaft l0. It will therefore be apparent that when the car- 'riage 18 is moved back and forth the plate 21 will move in the same direction as in eti'ect it is rigidly connected with said carriage, the consequence being that the tele Scopic shaft 10 will elongate or shorten the f fparticular action depending upon the direction of movement of said carriage. The short'shaft 23 is shownas having fastened Y thereto a bevel gear 25 in mesh wlth a bevel i' I5 gear 26- fastened to one end of the transversely-dis osed shaft 27 which is supported 'ointly by lock 28 detacha ly connected by screws as 29 or otli'crwisc with the carriage 18. 20 The-cross slide 19 is shown as supporting 'for swinging movement a swivel member asy 30 which moves about a vertical axis, a pivot 31 being shown to permit his action. Said swivel member 30 constitutes a suitable support for an auxiliary or tool-slide 32 which moves in a direct-ion corresponding substantially with the length of the bed t When the relieving attachment is not in place this auxiliary-.01' tool slide is fed back and -forth $0 on the swivel member by 'means of a screw 'and nut, the 'screw being .omitted although' the nut is shown being denotd by 33. l have not shown the means for holding the swivel member in an angularly adjusted position or in the position 1t occupies when the attachment is not being used as the same is Ywell known. By virtue of the swinging or .swivel member 30 the angular disposition of .the tool 3l relativeto the work may be va- 40 ried and said tool may be carried by the customary post 3st `adjustably sup orted in `the usual manner upon the tool-slide 32, It should be stated that the shaft 27 has a s lined connection with the bevel gear 26 so tliat as said shaft moves endwisc on the motionof the cross slide there will alwayshe a proper driving relation between said shaft and the telescopic shaft 10. In the present ease I-provide cam and spring mechanisms for giving to the auxiliary slide 32 a reciprocatorv movement, the cam means being preferabl employed to im art to'said auxlliary sli e a Working stro e during which the tool thereon is making a relieving cut while the spring means retracts said auxiliary slide, both means acting through suitable agents, as will hereinafter more particularly appear.-

The auxiliary or tool-slide is furnished 60 at 4its'rear with apendent flange or plate 35 to which a thrust in one direction is applied by a cam-operated lever as 3G in opposition to spring means. Said lever 36 is Shown as being of angle or elbow form and arin -s on or in the plate 2l and' l as pivoted at its elbow as at 3T in a slot 65 formed` in the leiachably-mounted hlock ifo'. The upper and substantially vcrlicallyvdisposed arm of said lever 3o is shown as having an elongatol slot 3S to receive a screw 39'tapped into a shoe :is-10 which hears in 70 the present cas'l againstthc outer facc of c the flange or plate and which is partially fitted in said slot 38. The working end ot' said shoe 40 is somewhat rounded or up proximately spherical to get the bcsl por;4 75 sible4 ell'ect therefrom. Between thc head of the screw A3S) and the lever 3V l interpuso a washer 4l serving its usual function. lt will be evidentthat when the upper arm of said lever 356 is rocked forward or toward the so left in lfig. 2 it will move. the auxiliary slide inward. By adjusting the shoe 4() toward o r from the axis of motion ofsaid lever 3T I can adjust the amount of worlting or advance stroke of the auxiliary slioc. 5=

As will he evident h v slightly hacking out the screw 3f) the shoe l() can he adjusted and when the adjustment is secured the screw will be tightened up. 'lheI length of thc llangc or plate Elo exceeds the width of the auxiliar)- or tool slide 32 by reason of which I get a wide range ot' :uljustmcnt to permit me to relieve tools which vary con! siderably in diameter and owing to the fact that the head of the shoe 40 is rounded or 95 spherical there will he no undue friction between said shoe and plaie or flange 35 as the latter is moved with respect to the former cross-wise of the lathe.

Fastened to the shaft 2T is a cam as 42 100 and said cam is shown as ha. vlg two ell'ective portions opposite to cach other and two releasing portions 43', the ell'cclive portions of said cam being adapted to successively engage the lower or practically lxorizontal arm of the lever 3G so as to swing the upper-.arm of said lever inward to advance the auxiliary slide and thereby cause the tool 33 to malte a relief cut on the tool or blank being operated. upon this operalitm being familiar in theI art so that a furlhcr detailed description of the same is not necessary. The lower arm of the lever il? may be equipped with a wear plattl 4l against which the wipe of the two portions 4I. of thc 115 cam 42 are directed. 'hen a releasing portion 43 of said cam comes opposite the lowcr arm of said lever 36 the auxiliary slid.i :l2 is free to be retracted by the powcr of thc spring means to which l have alluded. l will now set forth the spring mca'us `shown for this purpose.

I have shown as separably attached to the inner face of the flange 35 a block 45 screws being shown for the purpose and said hlocl; has open-ended bores 46 to receive springpluuvers as 47 the push splngs ol' which are tenoted by 4'1" and which springs serve l to retract` through the plungers the auxiliary or tool-slide 32; The spring-plungeis are virtually'tarried by the slidg 3:2 and appl .their ettect to the .swivel member whici during the relieving operation is fixed relatively tosaid slide 3:2 against movementr in all directions, it lbeing well-known 4that 'when relieving said swivel member is solidl clamped with its longitudinal axis in paral elism with that ot the bed 2. It therefore follows that onthe advance ofthe Slide Y 32 by the cam 42 acting through the intermediate parts in the manner previously described the spring-plungers 4T are forced into their bores or seats 4G the consequence being that the springs 47 are compressed.

or put underitension so that when a releasing ortion 43' of the cam 42 comes opposite the ower or horizontal arm of the lever 36 the said spring-piangere the springs of.

which 1 are then under maximum tension, can forcibly and rapidly draw, through the intermediate parts, the slide 32 backward and carry the tool thereon away from the work. lrVhen the lathe is used for ordinary purses the bracket 7, plate 21, plate 35, and lock 28 will be removed together with the parts which they support and when these parts are taken away the lathe will be practically likethe well-known type.

The attachment as an entirety or unit can be. applied to ordinary lathes the.. only change necessary being to tap properly posi- -tioned holes therein to receive the appropri'ate binding screws assuming that this is l the means used for holding the removable parts in place. y'ihen also the attachment might if desired be made a permanent part of the lathe. I desire also to state that in the present, case the relieving feed movement is applied to the auxiliary or tool-slide and not to the cross-slide thelatter being as 2. Inpractice ascrewA and nut or equivalent 'means will be provided for adjusting said plate' or 'way 20 although no means (for sake of clearness-)"` is shownV for this pur- By reason; of this featured secure a double Irl-j ustment of the tool, a rou-gh or initial adjustment being secured. by the movement of the Vcross slide 19 While a finished, final or fine adjustment can be obtained by the action ot' the plate or way 20.

lVhat I claim is:

1. The combination of a. tool-slide, a lever for operatingsaid slide, means active against the lever to cause astroke of theslidc, and means for changing the length of stroke 0f the slide without changing. the amount'of A movement of the lever.

2. The combination of 4a j toolslide, a swinging lever having an eloneated' slot,` a

shoe adpistablein said slot, br engagin said slide, a screw tapped into said shoe"an adapted to engage said lever to hold the shoe inan adjusted position, and means for operating said lever to cause a stroke of the slide. Y

3. The combination of a tool-slide, a lever for operating said slide, a rotary cam active against said lever to cause a stroke of said slide, and means for changing the' amount of stroke. of the slide by said lever without chan ing the amount of stroke of the lever. 4. he combination of a bed, a head-stock on said bed, providedv with a work-spindle,

a cross-slide on the bed, a tool-slide mounted on the cross slide for movement longitudinally of the bed, and automatic-mechanism for moving said tool-slide backward and 4forward independently of the motion of said cross slide. Y

5. The combination of a slide, a swin ing lever provided with a device adjustao e thereon toward and from the axis of motion of said lever and adapted to engage said slide` and mechanism for operating said lever to impart a stroke to said slide.

G. The combination of a bracket, a studl shaft supported by said bracket,y a telescopic shaft having a universal connection with said stud-shaft, a plate, also having a stud shaft connected by a universal joint with said telescopic shaft, a third shaft transverse to said second stud shaft, having a splined connection with said plate 'and geared to said second stud shaft, and a cam fixed to said third shaft, said bracket and plate being adapted for attachment to the bed of a lathe. f

't'. The combination of a bracket, 'a stud shaft supported by said bracket, a telescopic shaft having a universal connection with said stud shaft, a plate also having a stud shaft connected by a universal connection with said telescopic shaft, a third shaft transverse to `said stud shaft, having a. splined connection with said plate and geared to said secondstud shaft, a cam fixed to said thi-rd shaft, and a block provided with a swinging lever operable by said cam, the block being chambered to receive said cam. e

8. The combination of av, bed, a carriage movable longitudinally of Saidbed, a plate lio constituting a way,' slidably supported by movngsaid auxiliary slide buck am] forth said-carriage, for movement transversely of said bod, n crossslide supported by said pluto. for nuvementlnmsvcrsvly ofthe bod, :l swivel mvmber on said cross slide, an :luxilim'y slide supported by said swivel member for n'xuvcmcnt approximately longitudinnllynf mid bod, :unl automatic means for without operating said cross slide. v La 1n testimony whereof I :xlx my signatur-- in presence of two Witnesses.

B NGT M. \V. HANSOY.

ftncsses F. E. ANnEnsoN, f

Clms. E. Hom'. 

